Issue with Page Redirect in Minimal Theme

[Carolinebarr1]

Hi, I am currently getting the following error message when testing payments on my new store. I get this message when pressing the 'Buy It Now' button as well as trying to process payment.

The prompt is asking me to edit a code I cannot find in the liquid. 

[BobsMojo]

Hi @Carolinebarr1 

Looks like you're trying to checkout from within the theme editor. Use a separate browser window (preferably in private mode) to try your test purchase from outside the theme editor. 

The problem is that, unless you are on Shopify Plus, you do not have access to the checkout liquid.